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From Suresh Srinivas <sur...@hortonworks.com>
Subject Re: Heads up - 2.0.5-beta
Date Fri, 26 Apr 2013 01:36:08 GMT
Thanks for starting this discussion. I volunteer to do a final review of
protocol changes, so we can avoid incompatible changes to API and wire
protocol post 2.0.5 in Common and HDFS.

We have been working really hard on the following features. I would like to
get into 2.x and see it reach HDFS users:
# Snapshots
# NFS gateway for HDFS
# HDFS-347 unix domain socket based short circuits
# Windows support

Other HDFS folks please let me know if I missed anything.

To ensure a timely release of 2.0.5-beta, we should not hold back for
individual features. However, I would like to make necessary API and/or
protocol changes right-away. This will allow us to adding  features in
subsequent releases e.g. hadoop-2.2 or hadoop-2.3 etc without breaking
compatibility. For e.g. even if we don't complete NFS support, making
FileID related changes in 2.0.5-beta will ensure future compatbility.


On Thu, Apr 25, 2013 at 6:34 PM, Arun C Murthy <acm@hortonworks.com> wrote:

> Gang,
>  With hadoop-2.0.4-alpha released, I'd like 2.0.4 to be the final of our
> hadoop-2.x alphas. We have made lots of progress on hadoop-2.x and I
> believe we are nearly there, exciting times!
>  As we have discussed previously, I hope to do a final push to stabilize
> hadoop-2.x, release a hadoop-2.0.5-beta in the next month or so; and then
> declare hadoop-2.1 as stable this summer after a short period of intensive
> testing.
>  With that in mind, I really want to make a serious push to lock down APIs
> and wire-protocols for hadoop-2.0.5-beta. Thus, we can confidently support
> hadoop-2.x in a compatible manner in the future. So, it's fine to add new
> features, but please ensure that all APIs are frozen for hadoop-2.0.5-beta
>  Vinod is helping out on the YARN/MR side and has tagged a number of final
> changes (including some the final API incompatibilities) we'd like to push
> in before we call hadoop-2.x as ready to be supported (Target Version set
> to 2.0.5-beta):
>  http://s.apache.org/target-hadoop-2.0.5-beta
>  Thanks Vinod! (Note some of the sub-tasks of umbrella jiras may not be
> tagged, but their necessity is implied).
>  Similarly on HDFS side, can someone please help out by tagging features,
> bug-fixes, protocol/API changes etc.? This way we can ensure HDFS APIs &
> protocols are locked down too - I'd really appreciate it!
> thanks,
> Arun
> --
> Arun C. Murthy
> Hortonworks Inc.
> http://hortonworks.com/


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